- update to 2.1.21
- turn off compilation of libsasl v1 (finally)
- explicitly disable sqlite to avoid the build warning
- change the default mechanism which is set for saslauthd from "shadow" to
"pam" (#159194)
- split the shared library up from saslauthd so that multilib systems don't
have to pull in every dependency of saslauthd for the compat arch
(#166749)